Name

C Specification

void glClearIndex(

GLfloat c);

Parameters

c

Specifies the index used when the color index buffers are cleared.
The initial value is 0.

Description

glClearIndex specifies the index used by glClear
to clear the color index buffers.
c is not clamped.
Rather,
c is converted to a fixed-point value with unspecified precision
to the right of the binary point.
The integer part of this value is then masked with
2m-1,
where
m
is the number of bits in a color index stored in the frame buffer.

Errors

GL_INVALID_OPERATION is generated if glClearIndex
is executed between the execution of glBegin
and the corresponding execution of glEnd.